Patents by Inventor Charles Griesfelder

Charles Griesfelder has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Multiprobe eddy current flaw detection device with means to raise and lower the individual probes
    Patent number: 4101832
    Abstract: A flaw detection device, and method of operation thereof, for inspecting an entire workpiece, such as a tube or pipe, for the presence of defects. The detection device includes a plurality of pickup arms mounted in spaced relation with respect to each other around a work path, and a plurality of sensing coils carried by each of the pickup arms. The pickup arms are each mounted on a support member to pivot on an axis transverse to the direction of the work path so that the sensing coils may be moved into proximity and around the circumference of a workpiece as the workpiece travels along the work path.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: July 18, 1978
    Assignee: Republic Steel Corporation
    Inventors: Richard G. Baker, Joseph P. Vild, Charles Griesfelder, Donald P. Fox